991068656 has 20 divisors (see below), whose sum is σ = 1921382232. Its totient is φ = 495228096.

The previous prime is 991068653. The next prime is 991068679. The reversal of 991068656 is 656860199.

It is a super-3 number, since 3×991068656³ (a number of 28 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (50) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (991068653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8795 + ... + 45381.

Almost surely, 2^991068656 is an apocalyptic number.

It is an amenable number.

991068656 is a deficient number, since it is larger than the sum of its proper divisors (930313576).

991068656 is a wasteful number, since it uses less digits than its factorization.

991068656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38288 (or 38282 counting only the distinct ones).

The product of its (nonzero) digits is 699840, while the sum is 50.

The square root of 991068656 is about 31481.2429233663. The cubic root of 991068656 is about 997.0139778800.

The spelling of 991068656 in words is "nine hundred ninety-one million, sixty-eight thousand, six hundred fifty-six".